This paper reports the development and initial validation of the Persian language Irrational Performance Beliefs Inventory (iPBI-Persian). The original iPBI was developed to provide a validated measure of the four core irrational beliefs of rational emotive behavior therapy (REBT) within performance-based samples, such as athletes. Data retrieved from 334 athletes (169 men, 165 women, Mage = 21.52 ± 4.00 years) were analyses using SPSS and LISREL software packages. After the linguistic and cross-cultural adaptation processes, confirmatory factor analysis (CFA) results showed that six items did not have acceptable factor loadings. After removal of problem items, a 22-item version was developed (CFI = 0.96). The iPBI-Persian demonstrated excellent levels of reliability, with internal consistency and test–retest reliability, as well as construct validity. This paper indicates that the 22-item iPBI-Persian can be used as a self-assessment instrument to evaluate irrational performance beliefs in Iranian athlete samples.

本文报告了波斯语非理性表现信念清单（iPBI-波斯语）的开发和初步验证。最初的iPBI旨在为基于表现的样本（例如运动员）中的理性情绪行为疗法（REBT）的四个核心非理性信念提供一种经过验证的度量。使用SPSS和LISREL软件包对从334名运动员（169名男性，165名女性，法师= 21.52±4.00岁）中检索的数据进行了分析。经过语言和跨文化适应过程后，验证性因素分析（CFA）结果表明，六个项目的因素负荷不可接受。删除问题项后，开发了22个项目的版本（CFI = 0.96）。iPBI-波斯文展示了出色的可靠性水平，具有内部一致性和重测可靠性，以及构造效度。本文表明，22项iPBI-波斯语可用作评估伊朗运动员样本中非理性表现信念的自我评估工具。